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CN-122024406-A - Patient vital sign monitoring and anti-lost early warning system

CN122024406ACN 122024406 ACN122024406 ACN 122024406ACN-122024406-A

Abstract

The invention discloses a patient vital sign monitoring and anti-lost early warning system, and relates to the technical field of medical health management. The system comprises a multidimensional physical sign sensing terminal, a spatial positioning base station network, an edge gateway cluster, a central cloud control management platform and an intelligent access linkage unit, wherein the multidimensional physical sign sensing terminal is configured on the body surface of a patient and is used for collecting physiological parameters and motion gesture data in real time, the spatial positioning base station network is used for capturing messages to calculate real-time spatial coordinates of the patient, the edge gateway cluster is used for data protocol conversion and preliminary cleaning, the central cloud control management platform is used for dividing a geofence according to the data, establishing a dynamic mapping relation between the real-time state of the patient and access permission, generating multilevel early warning information by combining the spatial coordinates, and the intelligent access linkage unit is used for dynamically adjusting the access permission of a specific area. The invention realizes the deep coupling of physiological parameters and spatial positions, upgrades the static authority into dynamic real-time management and control, and effectively reduces the labor intensity of medical care and the accident risk while preventing the loss.

Inventors

  • Shui Hongmei
  • YANG QINGXIU
  • QUAN XIAOJUAN

Assignees

  • 四川大学华西医院

Dates

Publication Date
20260512
Application Date
20260415

Claims (10)

  1. 1. A patient vital sign monitoring and anti-lost early warning system, comprising: The multidimensional physical sign sensing terminal is configured on the body surface of a patient, is used for collecting physiological parameters and movement posture data of the patient in real time and sends a message through a wireless communication link; The space positioning base station network is deployed at a preset position of the controlled area, establishes wireless communication with the multidimensional sign sensing terminal and is used for capturing the message to calculate real-time space coordinates of a patient; The edge gateway clusters are distributed in each monitoring ward, and are communicated with the multidimensional sign sensing terminal and the central cloud control management platform, and are used for carrying out protocol conversion and preliminary cleaning on received data; The central cloud control management platform comprises a data association analysis module, a virtual geofence module, a permission dynamic scheduling module and a hierarchical early warning generation module, wherein the data association analysis module is used for acquiring the nursing level of a patient, the virtual geofence module is used for defining an authorized active area and a forbidden area in real time according to the nursing level, the permission dynamic scheduling module is used for establishing a dynamic mapping relation between the real-time state of the patient reflected by the physiological parameters and the movement gesture and access control passing permission according to the physiological parameters and the movement gesture data, and the hierarchical early warning generation module is used for combining the real-time space coordinate and the real-time state of the patient to generate multi-level early warning information; the intelligent access linkage unit is controlled by the central cloud control management platform or the edge gateway cluster and is used for receiving a scheduling instruction and dynamically adjusting the access right of a patient to a specific area.
  2. 2. The patient vital sign monitoring and anti-lost early warning system according to claim 1, wherein the wireless communication link of the multi-dimensional vital sign sensing terminal comprises an ultra-wideband communication link and a Bluetooth low-power consumption communication link, the multi-dimensional vital sign sensing terminal performs positioning interaction with the spatial positioning base station network by sending ultra-wideband pulse messages in a normal state that an ultra-wideband signal is not blocked, and the multi-dimensional vital sign sensing terminal provides continuous position completion by utilizing a fingerprint matching algorithm through scanning signal intensity indication values of surrounding Bluetooth beacons in an area where the ultra-wideband signal is blocked.
  3. 3. The patient vital sign monitoring and anti-lost early warning system according to claim 2, wherein the edge gateway cluster has a local autonomous and breakpoint continuous mechanism, and the specific logic is as follows: When the connection with the backbone network of the central cloud control management platform is normal, the edge gateway cluster eliminates an abnormal positioning packet generated by multipath effect by analyzing the arrival angle and signal intensity distribution of the message; When the network connection with the central cloud control management platform is interrupted, the edge gateway cluster is switched into a local autonomous mode from a relay mode, logic judgment is independently executed by utilizing pre-stored virtual geofence configuration information and patient sign threshold values, when the patient in the area is found to trigger the highest-level early warning, emergency warning is directly sent to a mobile care terminal in the sick area through a wireless local area network controlled locally, the multi-level early warning is divided into 3 stages, wherein the 3 rd stage early warning is the highest-level early warning, after the network is recovered, a data packet check sequence containing a time stamp interval and a cyclic redundancy check code is fed back by adopting a bidirectional confirmation mechanism, and differential retransmission is carried out to supplement a data hole.
  4. 4. The patient vital sign monitoring and anti-walk-away warning system according to claim 1, wherein the spatial localization base station network calculates real-time spatial coordinates of the patient by means of a time difference of arrival algorithm, and the calculation model follows the following hyperboloid equation set: , Wherein x, y and z represent real-time spatial coordinates of the patient to be solved; 、 、 represents the first C represents the propagation speed of electromagnetic wave in vacuum; represents the first Pulse arrival time stamps recorded by the base stations; Representing the starting time of the pulse sent by the multidimensional sign sensing terminal; The central cloud control management platform adopts a least square method to carry out iterative solution on a plurality of groups of observation data comprising the known three-dimensional coordinates and the pulse arrival time stamp; and a triaxial accelerometer is integrated in the multidimensional sign sensing terminal, and when the positioning deviation of two continuous sampling periods exceeds a preset distance threshold and the triaxial accelerometer does not detect acceleration motion vector mutation, a Kalman filtering algorithm is introduced to smooth the motion track.
  5. 5. The patient vital sign monitoring and anti-wandering pre-warning system of claim 1, wherein the hierarchical pre-warning generation module employs a weighted risk assessment model to quantify the safety risk consisting of the degree of abnormality of the vital sign and the distance of spatial out-of-bounds, and integrates the risk score The calculation formula of (2) is as follows: , Wherein, the A normalized score representing the heart rate deviation from the normal value interval, A normalized score representing the degree of blood oxygen saturation reduction, Reciprocal scores representing the distance of the patient's current location from the virtual geofence boundary; 、 、 Respectively representing the weight coefficients of each dimension; Generating a1 st-level sign abnormality early warning when a single index exceeds a preset threshold value, generating a2 nd-level space out-of-range early warning when a real-time space coordinate of a patient enters a preset distance range of a virtual geofence boundary, and generating a3 rd-level anti-lost core early warning when the 1 st-level early warning and the 2 nd-level early warning are triggered simultaneously or are close to the intelligent entrance guard linkage unit within the preset distance under the unauthorized condition.
  6. 6. The patient vital sign monitoring and anti-lost early warning system of claim 5, wherein the intelligent access control linkage unit is integrated with a dual-frequency card reader and a facial recognition device and comprises two-way verification and accompanying recognition logic: When the multidimensional sign sensing terminal triggers a door opening request, the face recognition device captures a current personnel image and compares the current personnel image with a patient photo in a system database, and if authentication fails, the door access point is automatically locked for a preset time period; when detecting that the patient passes through the access control area together with the medical staff, the system calculates the relative distance between the patient and the medical staff, and if the distance is smaller than a preset threshold value and the authorization label of the medical staff is in an activated state, the patient is judged to accompany the trip and the early warning is released.
  7. 7. The patient vital sign monitoring and anti-lost early warning system according to claim 1, wherein the system is further provided with an environment sensing unit and an ultrasonic sensing unit; the environment sensing unit is deployed in the ward and is used for monitoring environment noise and illumination intensity and establishing data connection with the central cloud control management platform, and when the environment parameter is monitored to exceed a set threshold value and the physiological parameter corresponding to the patient fluctuates in a bad direction, an environment intervention suggestion is generated or an illumination system of the ward is automatically linked to perform illumination adjustment; The ultrasonic sensing unit is deployed in a closed area where a space positioning signal is easy to be blocked, and a Bluetooth communication link is established with the multidimensional sign sensing terminal by utilizing the characteristic of ultrasonic reflection and is used for recognizing that a patient is in a sitting position, a standing position or an inverted ground state on the premise of privacy protection.
  8. 8. The patient vital sign monitoring and anti-lost early warning system according to claim 1, wherein the multidimensional vital sign sensing terminal is internally integrated with a triaxial accelerometer, and a local edge computing script is configured in the edge gateway cluster; The local edge calculation script is used for carrying out fast Fourier transform on the original data output by the triaxial accelerometer, analyzing the symmetry of the stride and the stride frequency of the patient, if the left-right asymmetry or the mopping walking characteristics are identified, predicting that the falling high risk exists, and outputting a directional early warning signal to the grading early warning generation module.
  9. 9. The patient vital sign monitoring and anti-lost early warning system according to claim 1, wherein the central cloud control management platform further has a machine learning false alarm filtering mechanism and a system health monitoring function: The machine learning false alarm filtering mechanism synchronously extracts gait characteristics of the multi-dimensional physical sign sensing terminal through multiplexing historical early warning events when physiological parameters of patients trigger abnormal early warning, and judges the gait characteristics to be false alarms and automatically filters the gait characteristics if the gait characteristics of the multi-dimensional physical sign sensing terminal are identified to be preset repetitive limb swing characteristics; When detecting that the number of the on-line space positioning base stations in a certain area is less than the minimum threshold value required by three-dimensional positioning, the system automatically marks the area as a blind area, automatically calls a Bluetooth beacon and an environment sensing unit in the area to serve as temporary alternative sensing sources, and simultaneously improves the real-time risk scoring cardinality of patients in the area.
  10. 10. The patient vital sign monitoring and anti-lost early warning system of claim 1, wherein co-transportation and management in a multi-hospital cross-ward environment is supported; When the ambulance arrives at a target hospital area and enters the coverage range of a spatial positioning base station network, the edge gateway of the target hospital area automatically recognizes the identity of the terminal and requests the central cloud control management platform to issue historical data and fence parameters of the patient, thereby realizing seamless transfer monitoring.

Description

Patient vital sign monitoring and anti-lost early warning system Technical Field The invention relates to the technical field of medical health monitoring and information management, in particular to a patient vital sign monitoring and anti-lost early warning system. Background In the fields of medical care and hospital informatization construction, the popularization of intelligent medical systems has become an important foundation for improving clinical efficiency and guaranteeing patient safety. Through the integration of the Internet of things, the high-precision sensor and the big data analysis technology, the medical institution can realize the refined perception and management of medical resources, medical staff and patients. The real-time vital sign monitoring and the activity track early warning serve as a core link of patient safety guarantee and are used for continuously tracking the health state and the spatial position of a patient through the intelligent sensing terminal, so that an active defense system covering the whole diagnosis and treatment process is constructed. The integrated patient management system utilizes the deep interaction between the wearable monitoring equipment and the back-end management platform to realize real-time acquisition of physiological parameters of patients and automatic identification of abnormal behaviors. The system generally integrates discrete individual sign data to a central monitoring center based on a wireless communication network, and provides dynamic clinical decision support and risk intervention means for medical staff by setting a safety threshold and a geofence rule, so that the configuration of nursing resources is optimized and the risk of medical accidents is reduced. In the prior art, traditional patient monitoring and early warning means depend on medical wrist bands with single functions, and the equipment can only realize isolated monitoring of basic physical signs such as heart rate or body temperature, or simply rely on satellite positioning and electronic fence technology to perform anti-lost management, so that vital sign data and space positioning information lack effective logic association. Meanwhile, the existing system has the problem that the fusion depth between the hospital information system and the access control system is insufficient, and the passing authority of the patient cannot be dynamically adjusted according to the real-time diagnosis and treatment state of the patient. In clinical practical application, traditional night patrol mode is very easy to disturb patient's rest because of needing closely to observe, and access control system adopts static authority management more, is difficult to effectively distinguish complex application scenario such as authorization traffic and illegal go out, can't realize accurate scenerization early warning. Due to the lack of deep fusion and intelligent analysis capability on multi-source heterogeneous data, the existing system still faces significant technical problems such as response lag, security hole and the like in the aspect of guaranteeing patient safety. Disclosure of Invention The invention aims to provide a patient vital sign monitoring and anti-lost early warning system, which aims to solve the problems that the traditional patient monitoring means has single function, vital signs and space positioning lack of logic association, the fusion depth with a hospital management system is insufficient, and the clinical nursing efficiency and the patient rest are difficult to be considered. In order to solve the problems, the technical scheme adopted by the invention is as follows: a patient vital sign monitoring and anti-lost early warning system, comprising: The multidimensional physical sign sensing terminal is configured on the body surface of a patient, is used for collecting physiological parameters and movement posture data of the patient in real time and sends a message through a wireless communication link; The space positioning base station network is deployed at a preset position of the controlled area, establishes wireless communication with the multidimensional sign sensing terminal and is used for capturing the message to calculate real-time space coordinates of a patient; The edge gateway clusters are distributed in each monitoring ward, and are communicated with the multidimensional sign sensing terminal and the central cloud control management platform, and are used for carrying out protocol conversion and preliminary cleaning on received data; The central cloud control management platform comprises a data association analysis module, a virtual geofence module, a permission dynamic scheduling module and a hierarchical early warning generation module, wherein the data association analysis module is used for acquiring the nursing level of a patient, the virtual geofence module is used for defining an authorized active area and a forbidden area in real time accor